Thermostatic valve



P. L VOLLMAN.

THERMOSTTIC VALVE.

APPLICATIQN FILED DEC. 4. 191B.

1,36394470 Patented Decn 28, 1920.

VOLLVAN, OF CHICAGO, ILLNOIS.

PETER J.

THERMOSTATC VALVE.

Specification of Letters Patent.

rateatea nee. as, ieee.

Application led Becember 4L, 1918. Serial No..265,238.

To dit tu hom. t may concern lie it known that l, l'ln'rnn J. VOLLMAN, a citiz/.en or' the United States, and a resident of Chicago, in the county of Cook and State ot' illinois, have invented certain new and useful improvements in Thermostatic Valves, oi" which the following` is a full, clear= and exact description.

ylhe invention relates to automatic thermostatic valves or traps for use in connection with heating' systems.

The object oit the invention is to provide an improved tliermostatic valve of this character which is simple in construction and eficient in operation and which can be easily assembled and disassembled. Other objects of the invention will appear more fully from the description.

The invention consists in the several novel features hereinafter set forth and more particularly deiined by claims at the conclusion hereof.

In the drawings: Figure 1 is a central vertical section of a valve embodying` the invention. Fig. 2 is a plan.y the thermostat and cap being removed. Fig. 3 is a detail of the device tor holding the thermostat in the cover. n

The valve comprises a casing l provided with a horizontal nipple 5 which is adapted 'for connection to a suitable coupling 6 to connect the valve te the outlet of a radiator. .in inlet-chamber 7 is formed below and adjacent the inlet 5 by an oblique cross-wall 8 and a portion of the outer wall of the casing'. rlhis chamber is formed to serve as a mud trap. This wall 8 is provided with a seat for a valve 10 which is slidably held in a bridge 11 integrally termed with the casing L1. The axis of the valve is oblique and the valve is located in an outlet chamber 12 formed on the other side of the oblique wall The casing is provided with a vertical nipple 13 to which an outlet pipe is adapted to be connected so that iiuid from the chamber 12 will pass into the return line of the heating` system or other system. Valve 10 is held normally open by a flat spring 11i which has slotted ends held by screws 15 in the lugs 16 formed inside of the casing. By adjustinga these screws, the operation of the valve 10 may be regulated as desired.

The central portion of this spring le bears against a shoulder 17 on the valve 10 to yieldingly hold the valve open. rllhe casineq is provided with a screw-threaded ob lique opening which is closed by a cap 19 and the latter' is screw-threaded to the casing and also oblique or inclined. This cap ontains the thermostatV 20 which is of the capsule type and is adapted to engage the upper end ot' the valve 10 to force the valve to its seat when the thermostat is expanded by the heat. A split ring 21, held in a groove 22 in the cap, serves to removably hold the lthermostat in the cap. A screw 23 serves as an adjustable abutment for the thermostat. A screw-plug 25, accessible from the outside of the valve, is adapted, when open, to permit the mud in the pocket to discharge into the outlet.

A characteristic of the valve illustrated and described is that the axis of the valve, cross-wall 8 and cap 19 are inclined or disposed obliquely with respectto the horizontal inlet and the vertical outlet of the casing. Ars a result of this arrangement, a number of important advantages are attained. It makes it possible to dispose the valve-seat or passage in the cross-wall 8 below the lowest portion of the inlet so as to insure drainage of the inlet at all times when the valve is open. It also makes it possible to avoid objectionable or undue proj ections on the valve and also makes it possible to bring` the axis of the vertical outlet close to the radiator or inlet. The oblique wall, in which the valve-seat is formed, also serves as a delector for the lluid to direct it downwardly toward the valve-seat below the inlet. By providing a spring for holding the valve normally open, there is no danger of the valve becoming stuck to its seat in low pressure heating systems. The split ring provides means for retaining the thermostat in the cap so that it will be removable with the cap and the conjoint removal of the cap and thermostat is advantageous in assembling` and disassembling the valve. By adjusting the screws which hold the spring for opening; the valve, the latter may be made responsive to different pressures.

The invention is not to be understood as restricted to the details set forth, since these may be modiied within the scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent., is:

1. 1n a thermostatie valve, the combina` tion of a casing having inlet and outlet connections, a Valve for controlling communication between the inlet and the outlet, a spring for opening the valve, a thermostat of the capsule type for closing and supported independently of the valve, said easing being provided Vwith an opening, a Cap for closing said opening having a chamber therein in which the thermostat is disposed, andV means engaging the margin of the eapsule for holding the thermostat in said Chamloer. Y

2. In artherniostatio valve, the Combination of a easing having inlet and outlet Conneotions, a valve for controlling communication between the inlet and outlet, a spring for opening the valve, a thermostatV of the capsule type for closing and supported independently of the valve, said Casing being provided With an opening, a cap for Closing said opening having a chamber therein in which the thermostat is disposed, and a ring engaging the margin of the capsule for holding the thermostat in said chamber.

PETER J. VOLLMAN. 

